St Teresa's Teacher Training Institute, Kottayam, is an approved single-stream college to train budding educators. St Teresa's Teacher Training Institute admission is designed especially to get the best among those who come in pursuit of a teaching profession. The institute follows the merit-based selection process that is quite common in Kerala colleges.

St Teresa's Teacher Training Institute admission to the institute is based mostly on the marks obtained by the candidate in the higher secondary (10+2) examination or equivalent. St Teresa's Teacher Training Institute gives due consideration to the marks scored in the qualifying examination for admitting a candidate. This low intake ensures that each student receives personal attention and quality education.